Tell me what kind of people do you think are often fickle?

You often meet such people in your life, especially when you are young. Even if you have been in contact with him for a long time, you may not be able to grasp his pulse. You said he was a warm-hearted man. When you really need his enthusiasm once, he hesitates again. When you get effective help from others, but he complains, why don't you go to him? If you say he is naturally arrogant and a little cold-blooded, he silently cares about all the details of your private life. You pursue your girlfriend, and he persuades you. He is indignant at your unsuccessful promotion. I am embarrassed to see you when you are having fun. I can't even tell the weather today. It should be said that this gentleman has a good brain and thin lips, have it both ways. Unfamiliar people give people the first impression that they are kind and have no strangers. Those who are familiar with the situation know that this person is good everywhere, has strong working ability and is fickle. ...